The following example demonstrates how to create a FileUpload control. . You can use the ContentType property to get the MIME content type of the file. tLength); int length = ; string fileName = ng(); string type = File. ContentType. = tType; C# code To get content type of a posted file of file upload control in ? 01 Wednesday.
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Last post Mar 05, Oct 09, So your piece of code should work. Oct 10, I Just tried your case with the ContentType and it will work, even if I changed the extension the contenttype will be te same. From txt to pdf is doesn’t work and I also tested fileuplpadcontrol to pdf doesn’t worked also. I think the ContentType in this case is useless or has some one another idea? Oke I get the same results as you now Therefore I don’t think this issue can be solved unless there is MIME detection somewhere within the.
Oct 14, Thanks for that code – it works perfectly. Could you please tell me where I can find out how to check other file types using this method? For example, you use for PDF files. Is there somewhere where I can see other codes?
fioeuploadcontrol If you ever find a site where somebody has already done this for the various file types available, please let me know! Feb 07, Jan 13, I m new to this forum. I to faced the same problem. Actually i need to upload a. But this header keeps on changing with.
Can u please guide me as to how to make sure that only the fileuplodcontrol or csv files are only allowed and no other file. I too am facing the same problem.
In my case,I have to upload a textfiles file,excel files,csv files and the processing for each of these file types on server is different. Its not as thorough, but it much easier to use and provides an equivalent output:. Jan 14, Next,in my case this approach can’t work Now what i ,as a user will do is change the extension of an exe or say a.
Please suggest what to do now. Is there no way of looking at a file’s internal content and identify what is it’s file type? So how does the server get to know whether the file being currently uploaded is an excel file or. The problem is that you would have to find fileupooadcontrol numbers out manually for each file type because I’ve never been able to find a list compiled.
Please note though that if a user changes a file extension, then that’s their problem not yours. The server will never run a file on the actually server with some minor exceptions like. HTMLso you just have to check that the file isn’t one conyenttype can be run online by the server.
Feb 10, Feb 26, Read objData, 0, Int32 objInputStream. Mar 05, The cause is r. Close in the Finally block. This closes the HttpPostedFile in the calling code. Close and your code will work.
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– How to get the posted file content type
Print Share Twitter Facebook Email. Related Links Guidance Samples Videos. FileUpload ContentType trickery Oct 09, I thought this might work: Is there anyway to actually check the real type of the file instead of just presuming the file extension is accurate?
FileUpload ContentType trickery Oct 10, Okay so perhaps something is wrong.
Please follow these steps to reproduce the problem: PDF Create a quick page with this code: Thanks for clarifying the problem. FileUpload ContentType trickery Oct 14, Please fipeuploadcontrol the replies as answers if they help or unmark if not. If you have any feedback about my replies, please contact msdnmg microsoft.
Microsoft One Code Framework. Hi Thanks for that code – it works perfectly. Here is the VB. NET translation for anyone else who might need it Then you can use it to check the file type. FileUpload ContentType trickery Feb 07, FileUpload ContentType trickery Jan 13, Thanks in tileuploadcontrol Regards Jatinder Walia. Its not as thorough, but it much easier postefile use and provides an equivalent output: FileUpload ContentType trickery Jan 14, FileUpload ContentType trickery Feb 10, You should add the following code to judge whether the posted file exist.
FileUpload ContentType trickery Feb 26, FileUpload ContentType trickery Mar 05,